If angle A is congruent to itself by the Reflexive Property, which transformation could be used to prove ΔABC ~ ΔADE by AA similarity postulate? triangles ABC and ADE, in which point D is between points A and B and point E is between points A and C Translate triangle ADE so that point D lies on point B to confirm ∠D ≅ ∠B. Translate triangle ADE so that point B lies on point E to confirm ∠B ≅ ∠E. Dilate ΔABC from point A by the ratio segment AD over segment AB to confirm segment AD ~ segment AB. Dilate ΔABC from point A by the ratio segment AE over segment AC to confirm segment AE ~ segment AC.

Translate triangle ABC so that point C lies on point E to confirm ∠C ≅ ∠E.

Step-by-step explanation

The reflexive property states that any real number, a, is equal to itself i.e a = a. Therefore for both triangles, the value of angle A is the same. We can say that the two triangles are congruent at angle A.

To prove that ΔABC ~ ΔADE by AA similarity postulate,  the congruency may be in angles (AAA) or two sides that include point A have the same length (SAS). So, Translate triangle ABC so that point C lies on point E to confirm ∠C ≅ ∠E.

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.